I want a DR file and i have a media ID of catalog backup.
Complete the Disaster Recovery tab in NBU-Catalog policy.
Ensure that email is working from OS level.
If Unix/Linux, ensure that mailx is working for root user.
If Windows, install and configure email utility called Blat.
PLEASE always mention exact NBU version as well as OS on the server that you are enquiring about?
Giving advice is a lot easier if we have all relevant info.
Supporting Storage Foundation and VCS on Unix and Windows as well as NetBackup on Unix and Windows
Handy NBU Links